Sofa



FIG. 1 is a front perspective view of a sofa showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevation view, the opposite side elevation being a mirror image thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a top plan view thereof.

The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

CLAIM The ornamental design for a sofa, as shown and described. 